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helium
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Reptilia
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Graptolithina
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Hemichordata (4)
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Invertebrata
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Cytherocopina
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Platycopida
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Insecta
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Cephalopoda
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Nautiloidea
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Porifera
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Demospongea (3)
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Protista
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Rotaliina
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Uvigerinidae
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Cassidulinacea
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Anomalinidae
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Cibicidoides
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Cibicidoides wuellerstorfi (1)
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Globigerinacea
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Globigerinidae
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Globigerinoides
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Globigerinoides ruber (3)
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Orbulina (1)
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Sphaeroidinella
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Sphaeroidinella dehiscens (1)
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Globorotaliidae
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Globorotalia
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Globorotalia menardii (1)
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Neogloboquadrina
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Neogloboquadrina dutertrei (2)
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Orbitoidacea
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Textulariina
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Radiolaria
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Vermes
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Fusulinina
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Plantae
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Gymnospermae
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Coniferales
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problematic fossils
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Tertiary
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Oligocene
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Chattian (1)
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Paleocene (3)
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Shahejie Formation (1)
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Pico Formation (1)
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Coal Measures (1)
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Mesozoic
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Cretaceous
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Comanchean
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Lower Cretaceous
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Travis Peak Formation (1)
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Tananao Schist (2)
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upper Mesozoic (1)
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Paleozoic
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Cambrian
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Wheeler Formation (2)
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Carboniferous
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Visean (2)
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Namurian (2)
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Kanawha Formation (1)
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Upper Carboniferous (3)
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Old Red Sandstone (1)
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Kellwasser event (1)
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Qixia Formation (2)
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Maokou Formation (9)
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Changxing Formation (6)
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Lopingian
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Changhsingian (6)
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Wuchiapingian (1)
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Permian-Triassic boundary (15)
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Phuket Group (4)
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Silurian
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Llandovery
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Wenlock (2)
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Upper Silurian
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Taiyuan Formation (1)
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Phanerozoic (2)
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Precambrian
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Archean
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Paleoarchean (1)
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-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (3)
-
Neoproterozoic
-
Cryogenian (2)
-
Dengying Formation (1)
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Doushantuo Formation (1)
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Ediacaran (1)
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Marinoan (2)
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Nantuo Formation (2)
-
Sturtian (1)
-
Vendian (1)
-
-
Paleoproterozoic (5)
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Sinian
-
Dengying Formation (1)
-
Doushantuo Formation (1)
-
Nantuo Formation (2)
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-
-
-
-
-
igneous rocks
-
extrusive rocks (2)
-
igneous rocks
-
carbonatites (1)
-
kimberlite (1)
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picrite (1)
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plutonic rocks
-
diabase (5)
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diorites
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plagiogranite (1)
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quartz diorites (1)
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tonalite (1)
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trondhjemite (1)
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-
gabbros
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norite (1)
-
-
granites
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adamellite (1)
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alkali granites (3)
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aplite (2)
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A-type granites (4)
-
biotite granite (4)
-
charnockite (2)
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felsite (1)
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granite porphyry (2)
-
I-type granites (7)
-
leucogranite (4)
-
monzogranite (2)
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S-type granites (8)
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-
granodiorites
-
granodiorite porphyry (1)
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-
lamprophyres (1)
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monzodiorite (1)
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monzonites (1)
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pegmatite (4)
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quartz monzonite (1)
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syenites (5)
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ultramafics
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chromitite (1)
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peridotites
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harzburgite (1)
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lherzolite (1)
-
spinel lherzolite (1)
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-
-
-
porphyry (10)
-
volcanic rocks
-
adakites (5)
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andesites
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boninite (1)
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-
basalts
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alkali basalts
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spilite (1)
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trachybasalts (1)
-
-
flood basalts (5)
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mid-ocean ridge basalts (8)
-
ocean-island basalts (3)
-
shoshonite (2)
-
tholeiite (2)
-
tholeiitic basalt (1)
-
-
basanite (1)
-
dacites (7)
-
glasses
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obsidian (1)
-
volcanic glass (6)
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-
keratophyre
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quartz keratophyre (1)
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-
komatiite (1)
-
pyroclastics
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ash-flow tuff (2)
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ignimbrite (7)
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pumice (5)
-
tuff (15)
-
-
rhyolites (14)
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-
-
ophiolite (27)
-
volcanic ash (8)
-
-
metamorphic rocks
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metamorphic rocks
-
amphibolites (4)
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cataclasites (1)
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eclogite (1)
-
gneisses
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granite gneiss (1)
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orthogneiss (2)
-
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granulites (2)
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marbles (7)
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metaigneous rocks
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metabasalt (2)
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metadiabase (2)
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metagabbro (1)
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metaperidotite (1)
-
serpentinite (5)
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-
metasedimentary rocks
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metasandstone (2)
-
-
metasomatic rocks
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greisen (4)
-
serpentinite (5)
-
skarn (10)
-
-
metavolcanic rocks (2)
-
migmatites (2)
-
mylonites
-
pseudotachylite (2)
-
-
schists
-
blueschist (2)
-
-
slates (1)
-
-
ophiolite (27)
-
turbidite (18)
-
-
meteorites
-
meteorites
-
stony meteorites
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chondrites
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ordinary chondrites
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L chondrites (1)
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-
-
-
-
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minerals
-
alloys (1)
-
arsenides
-
arsenopyrite (2)
-
lollingite (1)
-
-
borates
-
fluoborite (1)
-
-
carbonates
-
aragonite (3)
-
bastnaesite (1)
-
calcite (10)
-
dolomite (2)
-
siderite (2)
-
-
halides
-
chlorides
-
carnallite (1)
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halite (2)
-
sylvite (1)
-
-
fluorides
-
bastnaesite (1)
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fluoborite (1)
-
fluorite (1)
-
topaz (1)
-
-
-
hydrates (5)
-
iron minerals (1)
-
minerals (16)
-
native elements
-
diamond (2)
-
graphite (1)
-
-
organic minerals
-
amber (1)
-
-
oxides
-
anatase (1)
-
cassiterite (9)
-
chrome spinel (1)
-
chromite (3)
-
corundum (4)
-
diaspore (2)
-
gahnite (1)
-
goethite (4)
-
hematite (6)
-
hercynite (1)
-
hydroxides
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oxyhydroxides (2)
-
-
ilmenite (4)
-
iron oxides (5)
-
magnetite (7)
-
manganese oxides (1)
-
niobates
-
aeschynite (1)
-
-
rutile (6)
-
sapphire (5)
-
spinel (6)
-
titanium oxides (1)
-
todorokite (1)
-
uraninite (1)
-
-
phosphates
-
amblygonite (1)
-
apatite (12)
-
fluorapatite (4)
-
goyazite (1)
-
herderite (1)
-
monazite (9)
-
xenotime (1)
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-
silicates
-
aluminosilicates (1)
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chain silicates
-
aenigmatite group
-
sapphirine (2)
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-
amphibole group
-
clinoamphibole
-
hornblende (4)
-
-
-
prehnite (1)
-
pyroxene group
-
clinopyroxene
-
augite (1)
-
diopside (1)
-
fassaite (1)
-
-
orthopyroxene
-
enstatite (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
K-feldspar (1)
-
orthoclase (1)
-
sanidine (2)
-
-
plagioclase
-
albite (1)
-
-
-
nepheline group
-
nepheline (2)
-
-
silica minerals
-
coesite (1)
-
quartz (10)
-
-
zeolite group
-
clinoptilolite (1)
-
wairakite (1)
-
-
-
orthosilicates
-
nesosilicates
-
garnet group
-
andradite (1)
-
grossular (1)
-
pyrope (1)
-
-
olivine group
-
olivine (5)
-
-
titanite group
-
titanite (2)
-
-
topaz (1)
-
zircon group
-
coffinite (1)
-
zircon (83)
-
-
-
sorosilicates
-
chevkinite group
-
chevkinite (2)
-
-
epidote group
-
allanite (4)
-
epidote (3)
-
-
pumpellyite group
-
pumpellyite (1)
-
-
-
-
ring silicates
-
beryl (1)
-
tourmaline group (3)
-
-
sheet silicates
-
chlorite group
-
chlorite (10)
-
-
clay minerals
-
beidellite (3)
-
dickite (3)
-
halloysite (6)
-
kaolinite (21)
-
montmorillonite (3)
-
nacrite (2)
-
nontronite (1)
-
saponite (1)
-
smectite (16)
-
vermiculite (6)
-
-
illite (13)
-
mica group
-
biotite (6)
-
lepidolite (1)
-
muscovite (3)
-
phlogopite (1)
-
-
palygorskite (1)
-
pyrophyllite (1)
-
sepiolite (1)
-
serpentine group
-
berthierine (1)
-
-
talc (2)
-
-
-
sulfates
-
alunite (2)
-
anhydrite (3)
-
gypsum (1)
-
-
sulfides
-
arsenopyrite (2)
-
bornite (1)
-
chalcopyrite (4)
-
molybdenite (4)
-
pyrite (12)
-
pyrrhotite (4)
-
-
sulfosalts
-
sulfarsenates
-
enargite (3)
-
-
-
tellurides
-
calaverite (1)
-
hessite (1)
-
-
tungstates
-
scheelite (2)
-
wolframite (4)
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-
-
Primary terms
-
absolute age (143)
-
academic institutions (1)
-
Africa
-
Central Africa
-
Congo (1)
-
Congo Democratic Republic (1)
-
-
East Africa
-
Ethiopia (2)
-
Kenya (2)
-
Tanzania
-
Zanzibar (1)
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-
-
-
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